只是实现了用位图作为背景这一个小功能,内有详细步骤，希望给初学者以启迪。 本人是编程爱好者，希望能和大家一起交流。 -Only realize a bitmap as a background with a small function, which has detailed steps for beginners who want to give to enlightenment. I am a programming enthusiasts, and everyone hopes